Initial commit

1 files changed, 94 insertions, 0 deletions

diff --git a/sys/gio/cursor/gtrwaitp.x b/sys/gio/cursor/gtrwaitp.x
new file mode 100644
index 00000000..67f46dd8
--- /dev/null
+++ b/sys/gio/cursor/gtrwaitp.x
@@ -0,0 +1,94 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<ttyset.h>
+include	<error.h>
+include	<fset.h>
+include	<gio.h>
+include	"gtr.h"
+include	"grc.h"
+
+# GTR_WAITPAGE -- Print the "hit return to continue" message on the terminal
+# screen and wait for the user to respond before returning to graphics mode.
+# Redrawing of the graphics frame is optional.
+
+procedure gtr_waitpage (fd, stream)
+
+int	fd			# output file
+int	stream			# graphics stream
+
+int	key, i
+pointer	tty, tr
+int	getci(), ttystati()
+pointer	ttyodes(), gtr_init()
+errchk	gtr_init, ttyodes
+
+begin
+	tr = gtr_init (stream)
+	tty = ttyodes ("terminal")
+
+	repeat {
+	    # Print prompt in standout mode.
+	    call ttyclearln (fd, tty)
+	    call ttyso (fd, tty, YES)
+	    call fprintf (fd,
+		"[space=cmhelp,return=quit+redraw,q=quit+noredraw]")
+	    call ttyso (fd, tty, NO)
+	    call flush (fd)
+
+	    # Wait for user to hit a key.  This is done in text mode via
+	    # a raw getc rather than via a cursor read to avoid switching to
+	    # graphics mode.  On some terminals with separate text and
+	    # graphics planes a switch to graphics mode turns off the text
+	    # plane.
+
+	    call fseti (STDIN, F_RAW, YES)
+	    if (getci (STDIN, key) == EOF)
+		key = '\r'
+	    call fseti (STDIN, F_RAW, NO)
+
+	    # Take the action commanded by the user.  At present the morehelp
+	    # option merely prints cursor mode help; this is appropriate
+	    # because the first waitpage call occurs after printing user help
+	    # in response to ? (or after a :.show).
+
+	    switch (key) {
+	    case 'q':
+		# Quit, do not clear graphics and redraw.
+		if (TR_PAGE(tr) == NO) {
+		    # If screen paging is disabled (text drawn underneath
+		    # transparent graphics overlay), clear the text frame
+		    # only, using the clear line function.
+
+		    do i = 1, ttystati (tty, TTY_NLINES) {
+			call ttygoto (fd, tty, 1, i)
+			call ttyclearln (fd, tty)
+		    }
+		} else
+		    call ttyclearln (fd, tty)
+
+		call flush (fd)
+		call gki_reactivatews (stream, 0)
+		break
+
+	    case '\r', '\n':
+		# Quit, clear graphics and redraw.
+		call ttyclearln (fd, tty)
+		call flush (fd)
+		call gki_reactivatews (stream, 0)
+		call gtr_redraw (stream)
+		break
+
+	    case ' ':
+		# Print cursor mode help.
+		iferr (call pagefile (KEYSFILE, "cursor mode help"))
+		    call erract (EA_WARN)
+
+	    default:
+		# Illegal keystroke.
+		call printf ("\007")
+		call flush (STDOUT)
+	    }
+	}
+
+	call ttycdes (tty)
+end